On 5/9/2013 1:08 PM, Gregg Eshelman wrote: > I'm looking for rollers, wheels or bearings with a pointed edge to run in a > slot, but all I find are V groove wheels made to run along a pointed edge > rail. > > I'm building a XY gantry from 4040 extrusion and some delrin or urethane > wheels that can use the slots in the extrusion would be perfect for this > design. > > It will be low stress because the gantry will just be guiding a self > supported 2 joint arm in a 2D plane. Yup, that pattern follower torch I've > posted about before. > > Surprising to me that these things haven't been CNC retrofitted many times > already. Got a computer for free, $74 for three 9 foot pieces of surplus 4040 > and a bunch of t-nuts, bolts and brackets. There are plates on the arm > support post where the pattern holder arms mount, those plates will be ideal > for mounting the gantry frame. > >
Gregg: I've only ever used the "traditional" V groove wheel. It's hard for my old eyes to make out but doesn't http://www.8020.net/Images/Application-Thumb-99.jpg look similar to what you describe? It seems to me I've seen the same idea in someone else's catalog too but I can't remember where. Good hunting. Regards, Kent ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
